Vacuum pump
INSTALLER
Humid air left inside the refrigerant circuit can cause com-
pressor malfunction. After having connected the indoor
and outdoor units, bleed the air and humidity from the
refrigerant circuit using a vacuum pump.
(1) Unscrew and remove the caps from the 2-way and 3-
way valves.
(2) Unscrew and remove the cap from the service valve.
(3) Connect the vacuum pump hose to the service valve.
(4) Operate the vacuum pump for 10-15 minutes until an
absolute vacuum of 10 mm Hg has been reached.
(5) With the vacuum pump still in operation, close the
low-pressure knob on the vacuum pump coupling. Stop
the vacuum pump.
(6) Open the 2-way valve by 1/4 turn and then close it
after 10 seconds. Check all the joints for leaks using
liquid soap or an electronic leak device.
(7) Turn the body of the 2-way and 3-way valves. Discon-
nect the vacuum pump hose.
(8) Replace and tighten all the caps on the valves.
BLEEDING
INSTALLER
INDOOR
UNIT
Vacuum pump
Vacuum pump
Connect to the
indoor unit
Location
Twisting moment (N.m)
35-40
60-65
45-50
70-75
Φ1
2
Φ1
9
Diameter (mm)
Φ9
.52
Φ1
6
15-20
Φ6
(9) If the specification of outdoor unit gas valve is 3/8
＂
,
but curstomer needs to install 1/2
＂
indoor unit so that
it is need to use a “pipe joint subassembly” (Code 06643008)
to make a conversion joint with outdoor unit gas valve and
connection pipe, as show in following.
conversion joint
Refrigerant fluid direction of flow
3-way valve
2-way valve
Service
inlet
(2) Turn
(8) Secure
(7) Turn to open fully
(2) Turn
(8) Secure
Valve cap
(6) Open by 1/4 turn
(7) Turn to open fully
(2) Turn
(8) Secure
Valve cap
8
Drain-water hole
Bottom frame
Drain plug
Hose (available commercially,
inner dia. 16mm)
Drain connecter
Use bolts to secure the unit to a flat, solid floor.
When mounting the unit on a wall or the roof, make
sure the support is firmly secured so that it cannot
move in the event of intense vibrations or a strong
wind.
Do not install the outdoor unit in pits or air vents
Installing the pipes
Install the drain fitting and the drain hose(for
model with heat pump only)
Condensation is produced and flows from the outdoor unit
when the appliance is operating in the heating mode. In order
not to disturb neighbours and to respect the environment,
install a drain fitting and a drain hose to channel the conden-
sate water. Install the drain fitting and rubber washer on the
outdoor unit chassis and connect a drain hose to it as shown
in the figure.
Use suitable connecting pipes and equipment for the
refrigerant R410A.
Wrap all the refrigerant pipes and joints.
Tighten the connections using two wrenches working
in opposite directions.
Caution: Installation Must be Performed in Accordance
with the NEC/CEC by Authorized Personnel Only
Models(m)
18K
24/30K
Max. connection pipe length
20
70
Max. connection pipe length(Simple
one indoor unit)
10
20
The refrigerant pipes must not exceed the maximum
heights 5m(18K) or
10m(24K&30K).
INSTALLING THE OUTDOOR UNIT
